Sea-level rise - How do you overlay a polygon on top of other polygons?

I am currently working on a project where I have to generate maps showing land cover lost due to 1m and 2m sea-level rise. I have used an aerial photo to create land cover polygons and a polygon for the sea. I then caclulated the area of each polygon using an attribute table. I then generated 2 separate polygons for the 1 and 2m sea-level rise. How do you put the 1 and 2m polygon on top of the original map and then have new areas of the old polygons with the 1 and 2m sea-level rise? Im using Arc 9.3.1